At my school, there is a WiFi network where you can register up to one computer or phone. I, however, wish to connect my phone and my computer (Windows 7). I talked to an IT guy at my school and he told me that it registers the computer based on the MAC address (For the record, he's the one who suggested I spoof). So, I got my phone's MAC and now I want to change my computer's address to the same thing. I found this link and this video, so I know how to change it.
I was wondering if that would run into problems because they are normally on the same network at home.